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a.s.elliott(at)cox.net
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 Posted: Tue Oct 23, 2007 7:39 am Post subject: Fuel Hose Options |
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Folks:
IMHO, it is possible to put together a reliable fuel system using rubber hose, but I would not do it using the SAE J30R7 type hose and worm type hose clamps that Zenith provides with the kit.
I am replacing that hose with the modern J30R9 type Teflon-lined fuel injection hose, which is designed for the higher pressures and higher temperatures associated with modern automotive fuel systems. I am also replacing the clamps with screw clamp units sized specifically for that hose (web search for "fuel injection hose clamps"). These hoses easily go car lifetimes in the engine compartments there.
As you might expect, this stuff costs quite a bit more (maybe 3X more?) than the lower-spec parts, but still less (maybe 1/4 as much?) than aircraft hoses. And it retains the relative ease of length-sizing, installation and maintenance of rubber hoses. If you fire-sleeve or otherwise protect the hoses in the engine compartment, IMHO you can get an equivalently safe system.
As always, you have a choice as the builder. In my case, I have chosen to go for regular inspection and replacement (possible because of the lower cost and ease of maintenance) instead of total "invulnerability".
FWIW,
Andy Elliott, Mesa, AZ
N601GE (reserved)
601XL/TD/QB, Corvair, building...
[quote][b]
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pmaxpmax(at)HOTMAIL.COM
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| Posted: Tue Oct 23, 2007 9:51 am Post subject: Fuel Hose Options |
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The pressurized side of my fuel system (past the fuel pumps) have all been done with Earl's Performance Plumbing Auto-Flex stainless steel braid reinforced synthetic rubber hose, with AN6 Hardware. More info here: ( http://www.holley.com/division/Earls.asp#17 ). I purchased it all from Summit Racing ( http://summitracing.com/ ). For the last two years, I've been flying with the gravity side of the fuel system using the rubber hoses supplied by Zenith. I took the wings off to bring the plane home from the airport for other upgrades, and decided to upgrade the fuel lines in the wings, so the entire system will be the same, higher quality stuff. The rubber hose supplied by Zenith still looks good, and there were no problems before.
Phil Maxson
601XL/Corvair
Northwest New Jersey
| Quote: | From: a.s.elliott(at)cox.net
To: zenith-list(at)matronics.com
Subject: Zenith-List: Fuel Hose Options
Date: Tue, 23 Oct 2007 08:37:49 -0700
.ExternalClass {background-position:left top;font-size:11pt;margin-left:10px;color:#000000;background-repeat:no-repeat;font-family:Courier New;} Folks:
IMHO, it is possible to put together a reliable fuel system using rubber hose, but I would not do it using the SAE J30R7 type hose and worm type hose clamps that Zenith provides with the kit.
I am replacing that hose with the modern J30R9 type Teflon-lined fuel injection hose,
<<SNIP>>
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Climb to the top of the charts! Play Star Shuffle: the word scramble challenge with star power. Play Now! [quote][b]
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